Piezoresistivity in self-compacting concrete mixes with hybrid additions of carbon fibers and nanofibers
Identifiers
Permanent link (URI): http://hdl.handle.net/10017/58949DOI: 10.1051/matecconf/202337805005
ISSN: 2261-236X
Date
2023-04-28Funders
The authors acknowledge the financial support provided by the projects: CALTH3D (TED2021- 132585B-I00), funded by MCIN/AEI/10.13039 /501100011033 and the European Union “NextGeneration EU” / PRTR; the European Union by the action HORIZON-TMA-MSCA-SE_2021 “BEST-Biobased Energy-efficient materials and Structures for Tomorrow” (grant number 101086440).
The authors want to thank A. Rodríguez for his technical support. They would also like to thank the companies, some of the components were supplied by Grupo Antolin, Cementos Portland Valderribas, BASF Construction Chemicals España S.L., Omya Clariana.
Bibliographic citation
MATEC Web of Conferences, 2023, v. 378, 05005
Keywords
Self-sensing concrete
Self-compacting concrete
Piezoresistivity
Carbon nanofiber
Carbon fiber
Description / Notes
SMARTINCS"23 Conference on Self-Healing, Multifunctional and Advanced Repair Technologies in Cementitious Systems
Project
info:eu-repo/grantAgreement/AEI//TED2021-132585B-100/ES//CALTHED
info:eu-repo/grantAgreement/EC//TED2021-132585B-100/EU//CALTHED
info:eu-repo/grantAgreement/EC/HE/101086440/EU/Biobased Energy-efficient materials and Structures for Tomorrow/BEST
Document type
info:eu-repo/semantics/article
Version
info:eu-repo/semantics/publishedVersion
Rights
Attribution 4.0 International (CC BY 4.0)
Access rights
info:eu-repo/semantics/openAccess
Abstract
Self-sensing properties of concrete structures can be achieved through the incorporation of additions in carbon-based materials (CBM) that modify electrical properties and provide piezoresistive (PZR) properties to the cement paste. PZR in pastes and mortar mixes with different types of carbon-based materials such as fibers of different sizes has been extensively tested. However, very limited studies on selfsensing properties in concrete are available due to the lower content of paste volume that leads to a decrease of concrete PZR. However, self-compacting concrete (SCC) can be an ideal candidate to implement PZR, due to two fundamental traits: the larger amount of paste of SCC compared to a conventional concrete and larger volumetric fraction of fiber can be incorporated due to a reduced effect on SCC workability and consistency. The present study aims to assess PZR properties of SCC with carbon-based components of different sizes. Combining carbon nanofibers (NFC) and carbon fibers (CF), in hybrid systems, could lead to obtain SCC with self-sensing properties identifying their effectiveness thresholds. The self-detection performance of PZR-SCC samples under mechanical stress was verified by resistivity and PZR experimental tests.
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